Thanks Nick for the good feedback. And yes, PocketTopo paired with TopParser is still 'the only way to survey' if you are processing with Therion. At least that is my biased opinion. Alas windows devices are on the way out, so I am hopeful that SexyTopo will be imbued with the simplicity, flexibility and speed of use of PocketTopo - it is not there yet, but it is looking promising. Topodroid has many nice features that I wish PocketTopo had, but apart from calibrating distos well, it does not have as smooth a workflow or play as nicely with Therion as it could/should. However if you tend to have small caves or short survey trips, then your opinion of Topodroid over TopParser might be comparatively better. Bruce -----Original Message----- From: Therion <therion-bounces@speleo.sk> On Behalf Of Nick Bairstow Sent: Friday, 26 April 2019 21:35 To: List for Therion users <therion@speleo.sk> Subject: Re: [Therion] Making projected elevations There is another option with regards to producing projected elevations. By using PocketTopo and then using Andrew Atkinsons Topparser to create the directories and files needed for your Therion project, as well as the extended elevation files you have the option of producing a projected elevation .th2 along with a projected xvi which shows all your splays and not just the centreline. The splays can sometimes be difficult to interpret as with PocketTopo you have no option to sketch a projected elevation whilst surveying but I find this much easier/quicker than the method Bruce suggested. As with a lot of things a bit of forward planning with how you survey your cave (if that is possible) can make a big difference to how difficult this process is. Can I say you two (Tarquin and Bruce) make a quite good team. Tarquin you are asking some good questions for a new user and Bruce as always you have answers normal people can understand. Nick